Observer's guide
About NGC 5248
NGC 5248 (C45) is catalogued as a galaxy in Boötes. Its J2000 position is RA 13:37:32, Dec +08:53:06, corresponding to 204.3834 degrees RA and 8.8851 degrees Dec. The local catalogue places it about 74,000,000 light-years away. Its referenced angular extent is approximately 4.63 by 3.1 arcminutes.
Observing tips
StarWatchr rates this as a very hard target at magnitude 10.3. It is associated with spring observing, with midnight placement typically strongest around April. From 52 degrees north its theoretical meridian altitude is about 46.9 degrees; local horizons and the live altitude chart determine the practical window.
Because it is faint, use a larger aperture where possible, avoid bright Moon conditions, and use averted vision.
What to expect
The SIMBAD classification for the matched source is G. SIMBAD records the morphology as SAB. A published radial velocity value is 1150 km/s. The SIMBAD record currently connects it to 561 bibliographic references.
At roughly 4.6 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 4.63 by 3.1 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.